Lattice oxygen activation and local electric field enhancement by co-doping Fe and F in CoO nanoneedle arrays for industrial electrocatalytic water oxidation

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: Feb. 3, 2024

Abstract Oxygen evolution reaction (OER) is critical to renewable energy conversion technologies, but the structure-activity relationships and underlying catalytic mechanisms in catalysts are not fully understood. We herein demonstrate a strategy promote OER with simultaneously achieved lattice oxygen activation enhanced local electric field by dual doping of cations anions. Rough arrays Fe F co-doped CoO nanoneedles constructed, low overpotential 277 mV at 500 mA cm −2 achieved. The dually doped could cooperatively tailor electronic properties CoO, leading improved metal-oxygen covalency stimulated activation. Particularly, induces synergetic effect tip enhancement proximity effect, which effectively concentrates OH − ions, optimizes barrier promotes O 2 desorption. This work demonstrates conceptual couple for effective electrocatalytic water oxidation.

Language: Английский

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Atomically Local Electric Field Induced Interface Water Reorientation for Alkaline Hydrogen Evolution Reaction

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(26)

Published: March 8, 2023

The slow water dissociation process in alkaline electrolyte severely limits the kinetics of HER. orientation H2 O is well known to affect process, but hard control because its random distribution. Herein, an atomically asymmetric local electric field was designed by IrRu dizygotic single-atom sites (IrRu DSACs) tune adsorption configuration and orientation, thus optimizing process. intensity DSACs over 4.00×1010 N/C. ab initio molecular dynamics simulations combined with situ Raman spectroscopy analysis on behavior show that M-H bond length (M=active site) shortened at interface due strong gradient optimized promotes interfacial water. This work provides a new way explore role single atomic hydrogen evolution reaction.

Language: Английский

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A review on ZnO-based S-scheme heterojunction photocatalysts

CHINESE JOURNAL OF CATALYSIS (CHINESE VERSION), Journal Year: 2023, Volume and Issue: 52, P. 32 - 49

Published: Sept. 1, 2023

Language: Английский

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Electrocatalytic CO₂ Reduction to C₂₊ Products in Flow Cells

Advanced Materials, Journal Year: 2023, Volume and Issue: 36(5)

Published: Aug. 31, 2023

Abstract Electrocatalytic CO 2 reduction into value‐added fuels and chemicals by renewable electric energy is one of the important strategies to address global shortage carbon emission. Though classical H‐type electrolytic cell can quickly screen high‐efficiency catalysts, low current density limited mass transfer process essentially impede its industrial applications. The cells based on electrolyte flow system (flow cells) have shown great potential for devices, due higher density, improved local concentration, better efficiency. design optimization are significance further accelerate industrialization electrocatalytic reaction (CO RR). In this review, progress RR C 2+ products concerned. Firstly, main events in development outlined. Second, principles products, architectures, types summarized. Third, optimizing generate reviewed detail, including cathode, anode, ion exchange membrane, electrolyte. Finally, preliminary attempts, challenges, research prospects toward discussed.

Language: Английский

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Cooperative alkaline hydrogen evolution via inducing local electric field and electron localization

CHINESE JOURNAL OF CATALYSIS (CHINESE VERSION), Journal Year: 2023, Volume and Issue: 54, P. 229 - 237

Published: Nov. 1, 2023

Language: Английский

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Nanocurvature-induced field effects enable control over the activity of single-atom electrocatalysts

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: Feb. 26, 2024

Tuning interfacial electric fields provides a powerful means to control electrocatalyst activity. Importantly, can modify adsorbate binding energies based on their polarizability and dipole moment, hence operate independently of scaling relations that fundamentally limit performance. However, implementation such strategy remains challenging because typical methods the field non-uniformly affects only minority active sites. Here we discover uniformly tunable modulation be achieved using model system single-atom catalysts (SACs). These consist M-N

Language: Английский

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Hierarchically Ordered Pore Engineering of Metal–Organic Framework‐Based Materials for Electrocatalysis

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(27)

Published: April 17, 2024

Abstract Ordered pore engineering that embeds uniform pores with periodic alignment in electrocatalysts opens up a new avenue for achieving further performance promotion. Hierarchically ordered porous metal–organic frameworks (HOP‐MOFs) possessing multilevel distribution are the promising precursors exploration of electrocatalysts, while scalable acquisition HOP‐MOFs editable components and adjustable size regimes is critical. This review presents recent progress on hierarchically MOF‐based materials enhanced electrocatalysis. The synthetic strategies different regimes, including self‐assembly guided by reticular chemistry, surfactant, nanoemulsion, nanocasting, first introduced. Then applications as exploring summarized, selecting representatives to highlight boosted performance. Especially, intensification molecule ion transport integrated optimized electron transfer site exposure over derivatives emphasized clarify directional integration effect endowed engineering. Finally, remaining scientific challenges an outlook this field proposed. It hoped will guide nanocatalysts boosting catalytic promoting practical applications.

Language: Английский

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Enhancing neutral hydrogen production by disrupting the rigid hydrogen bond network on Ru nanoclusters through Nb₂O₅-mediated water reorientation

Energy & Environmental Science, Journal Year: 2024, Volume and Issue: 17(14), P. 5091 - 5101

Published: Jan. 1, 2024

Nb 2 O 5 with a negative charge can disrupt the rigid H-bond network on surface of Ru nanoclusters, making it easier for free water molecules to reach catalyst, thus accelerating reactivity hydrogen reduction.

Language: Английский

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Gas diffusion in catalyst layer of flow cell for CO2 electroreduction toward C2+ products

Nano Research, Journal Year: 2023, Volume and Issue: 17(3), P. 1101 - 1106

Published: Aug. 7, 2023

Language: Английский

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Advances in electrolyzer design and development for electrochemical CO₂ reduction

EcoMat, Journal Year: 2023, Volume and Issue: 5(7)

Published: April 27, 2023

Abstract In view of global energy transition and environmental issues, electrochemical conversion carbon dioxide (CO 2 ) to high value‐added chemicals by using clean renewable electricity, as an advanced capture, utilization storage (CCUS) technology, demonstrates a promising approach reach the neutrality with additional economic benefits well. Over past decade, various new valid catalysts in CO reduction (ECO2R) have been designed intensively investigated. Unfortunately, constructing appropriate ECO2R electrolyzer rate long‐term stability unleash full potential electrocatalysts remains recognized challenge, especially it has not yet attracted attention. This review summarizes progress reactor their corresponding structure characteristics/ performance. Besides, current challenges bottlenecks CO2RR are discussed. We aim introduce advances detail offer enlightenment for large‐scale industrial application ECO2R. image

Language: Английский

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